ultraluminous

adjective

ul·tra·lu·mi·nous ˌəl-trə-ˈlü-mə-nəs

: emitting an extremely large amount of electromagnetic radiation (such as light, X-rays, or infrared radiation) : extremely luminous

an ultraluminous infrared galaxy

We review the likely population, observational properties, and broad implications of stellar-mass black holes and ultraluminous x-ray sources.—

Rob Fender et al.

Examples of ultraluminous in a Sentence

Recent Examples on the Web Even rarer and more spectacular are ultraluminous infrared galaxies, or ULIRGs. —

Aaron S. Evans, Scientific American, 1 Dec. 2021 These are ULXs, or ultraluminous X-ray sources. —

Alison Klesman, Discover Magazine, 21 Feb. 2017

These examples are programmatically compiled from various online sources to illustrate current usage of the word 'ultraluminous.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.